$theme:(
    light:(
        contentColor: #000,
        contentBg:#fff,
        bgFilter:  brightness(0.8),
        mixMod: lighten,
        rootBG: #fff,
    ),
    dark:(
        contentColor: #fff,
        contentBg:#000,
        bgFilter: brightness(1.2),
        mixMod: darken,
        rootBG: #000,
    )
);
$curTheme:"light";
@mixin useTheme(){
    @each $key, $value in $theme{
        $curTheme: $key !global;
        html[data-theme="#{$key}"] & {
            @content;
        }
    }
};
@function getVar($paramName){
    @return map-get($map: map-get($theme, $curTheme), $key: $paramName)
};